48 



the polyps are slender spindles, straight or curved, and a few slightly flattened 



forms. All have spiny projections, which are very marked in some of the smallest. 



The foUowino- measurements were taken of length and breadth in millimetres : 



1. General polyp spicules, IxO'l; O'S x O'OO ; O-GxO-05; O-SSxO'OS. 



2. Tentacular spicules, O'lS x 0-04 ; 0-14 x 0-04 ; 0-12 x 0-04. 



3. Those that project at the apex, fGxO-OO; 1-45 xO'l; 1-4x0.12; 



l-3x0-l ; r2xO-l. 



The spicules of the stem are similar to those of the polyps except for their 

 smaller size. Their measurements are : 



0-8xO-095; 0-8xO-08; 0-5xO-OG; 0-35x0-09; 0-3x0-05. 



Among the spicules, both of the polyp and of the general coeuenchyma, there 

 are some more irregular forms, with processes about O'l mm. in length, bearing 

 small spines. 



We do not think that there is any valid distinction between A. aspera, 

 Pourtales, and A. sj^iriosa, Hiles. 



Locality : Station 333 ; 6° 31' N., 79° 38' 45" E. ; 401 fathoms. 



Previously recorded from Havana, and A. sjnnom (Hilcs) from Blanche Bay, 

 New Britain. 



